(function(){
    /*
     *iphone 6plus
     *原来的尺寸                            414
     *要变成的尺寸（以iPhone 6为基准）375    375
     *比例                                  414/375
     */
    // var curWidth = window.screen.width; //iphone 6plus为414px
    // var targetWidth = 1920;
    // if(curWidth<targetWidth){
    //     var scale = curWidth/targetWidth*0.75;
    //     var meta = document.createElement("meta");
    //     meta.name = "viewport";
    //     meta.content = 'initial-scale='+scale+',minimum-scale='+scale+',maximum-scale='+scale+'';
    //     document.head.appendChild(meta);
    // }
})();